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Finding the Fourth Proportional to 139,423.68, 209,135.52 and 34,242.62

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Solution

The fourth proportional to 139,423.68, 209,135.52 and 34,242.62 is: 51,363.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,423.68 : 209,135.52 = 34,242.62 : x
  2. Step 2: Convert to fraction form
    139,423.68/209,135.52 = 34,242.62/x
  3. Step 3: Cross multiply
    139,423.68x = 209,135.52 × 34,242.62
  4. Step 4: Simplify right side
    139,423.68x = 7,161,347,094.18
  5. Step 5: Solve for x
    x = 7,161,347,094.18/139,423.68
  6. Step 6: Final answer
    x = 51,363.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.